x402 Protocol Shifts to Usage-Based Pricing to Support AI Agent Commerce

The Coinbase Developer Platform has launched the 'Upto' scheme for the x402 protocol, transitioning the network from a fixed-fee structure to usage-based pricing. This shift is specifically designed to accommodate the needs of agentic AI, where costs fluctuate based on compute time, token counts, and query complexity. Previously, the x402 protocol only supported deterministic APIs with exact payments, which created inefficiencies for AI services. Under the new system, sellers can set maximum price caps while buyers authorize payments up to a specific limit, ensuring users are charged only for the actual resources consumed rather than a flat estimate. The 'Upto' scheme is an EVM implementation that supports all ERC20 tokens. Additionally, the CDP Facilitator now enables fully gasless payments, reducing friction for the near-instant transactions required for autonomous AI agents to operate efficiently. The protocol, originally developed by Coinbase, was recently transferred to the nonprofit Linux Foundation. The x402 Foundation now includes strategic stakes from industry giants such as Amazon Web Services, Google, and Microsoft, signaling broad corporate interest in agentic commerce infrastructure. Despite these technical advancements, the protocol faces a significant adoption challenge. Dune Analytics data reveals a steep decline in activity since November 2025, when weekly transactions peaked at 13.7 million. By the final week of March 2026, weekly volume had plummeted to 112,708 transactions, highlighting a gap between technical capability and market utilization.